/Engine/Source/Runtime/NavigationSystem/Public/NavMesh/NavMeshPath.h
Calculates total length of string pulled path. Does not generate string pulled path if it's not already generated (see bWantsStringPulling and bStrigPulled) Internal use only
[FVector::FReal](API\Runtime\Core\Math\TVector\FReal) GetStringPulledLength ( const int32 StartingPoint ) const